A1C5K

1-[(2R,3R)-3-{[(7P)-7-(8-ethynyl-7-fluoronaphthalen-1-yl)-8-fluoro-2-{[(2R,4R,7aS)-2-fluorotetrahydro-1H-pyrrolizin-7a(5H)-yl]methoxy}pyrido[4,3-d]pyrimidin-4-yl](methyl)amino}-2-methylpyrrolidin-1-yl]-3-(pyrazin-2-yl)propan-1-one

Created:	2026-01-23
Last modified:	2026-03-04

Find Related PDB Entry
1 entries where A1C5K is covalently linked to polymer or other heterogen groups

Find related ligands:

Similar Ligands (Stereospecific) Similar Ligands (including Stereoisomers) Similar Ligands (Quick Screen) Similar Ligands (Substructure Stereospecific) Similar Ligands (Substructure including Stereoisomers)

Chemical Details
Formal Charge	0
Atom Count	92
Chiral Atom Count	4
Bond Count	99
Aromatic Bond Count	28

2D diagram of A1C5K

Toggle Hydrogen Toggle Labels

Chemical Component Summary
Name	1-[(2R,3R)-3-{[(7P)-7-(8-ethynyl-7-fluoronaphthalen-1-yl)-8-fluoro-2-{[(2R,4R,7aS)-2-fluorotetrahydro-1H-pyrrolizin-7a(5H)-yl]methoxy}pyrido[4,3-d]pyrimidin-4-yl](methyl)amino}-2-methylpyrrolidin-1-yl]-3-(pyrazin-2-yl)propan-1-one
Systematic Name (OpenEye OEToolkits)	1-[(2~{R},3~{R})-3-[[7-(8-ethynyl-7-fluoranyl-naphthalen-1-yl)-8-fluoranyl-2-[[(2~{R},8~{S})-2-fluoranyl-1,2,3,5,6,7-hexahydropyrrolizin-8-yl]methoxy]pyrido[4,3-d]pyrimidin-4-yl]-methyl-amino]-2-methyl-pyrrolidin-1-yl]-3-pyrazin-2-yl-propan-1-one
Formula	C₄₀ H₃₉ F₃ N₈ O₂
Molecular Weight	720.785
Type	NON-POLYMER

Chemical Descriptors
Type	Program	Version	Descriptor
SMILES	ACDLabs	14.52	FC1CC2(CCCN2C1)COc1nc2c(F)c(ncc2c(n1)N(C)C1CCN(C(=O)CCc2cnccn2)C1C)c1cccc2ccc(F)c(C#C)c21
SMILES	CACTVS	3.385	C[CH]1[CH](CCN1C(=O)CCc2cnccn2)N(C)c3nc(OC[C]45CCCN4C[CH](F)C5)nc6c(F)c(ncc36)c7cccc8ccc(F)c(C#C)c78
SMILES	OpenEye OEToolkits	3.1.0.0	CC1C(CCN1C(=O)CCc2cnccn2)N(C)c3c4cnc(c(c4nc(n3)OCC56CCCN5CC(C6)F)F)c7cccc8c7c(c(cc8)F)C#C
Canonical SMILES	CACTVS	3.385	C[C@@H]1[C@@H](CCN1C(=O)CCc2cnccn2)N(C)c3nc(OC[C@@]45CCCN4C[C@H](F)C5)nc6c(F)c(ncc36)c7cccc8ccc(F)c(C#C)c78
Canonical SMILES	OpenEye OEToolkits	3.1.0.0	C[C@@H]1[C@@H](CCN1C(=O)CCc2cnccn2)N(C)c3c4cnc(c(c4nc(n3)OC[C@@]56CCCN5C[C@@H](C6)F)F)c7cccc8c7c(c(cc8)F)C#C
InChI	InChI	1.06	InChI=1S/C40H39F3N8O2/c1-4-28-31(42)11-9-25-7-5-8-29(34(25)28)36-35(43)37-30(21-46-36)38(48-39(47-37)53-23-40-14-6-17-50(40)22-26(41)19-40)49(3)32-13-18-51(24(32)2)33(52)12-10-27-20-44-15-16-45-27/h1,5,7-9,11,15-16,20-21,24,26,32H,6,10,12-14,17-19,22-23H2,2-3H3/t24-,26-,32-,40+/m1/s1
InChIKey	InChI	1.06	RUHMWAWGMHOHTK-ZLIJNCHHSA-N

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.